SOLVED

Unknown User displayed in chats

%3CLINGO-SUB%20id%3D%22lingo-sub-1667791%22%20slang%3D%22en-US%22%3EUnknown%20User%20displayed%20in%20chats%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-1667791%22%20slang%3D%22en-US%22%3E%3CP%3EHi%20All%2C%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3ESome%20of%20our%20employees%20have%20a%20list%20of%20Unknown%20users%20displayed%20while%20the%20%22Unknown%20User%22%20is%20an%20active%20user%20in%20AD%2FAAD%2FO365.%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EI%20picked%20one%20affected%20employee%20and%20reinstalled%20Office%20365%20and%20Teams%20but%20the%20issue%20reoccured%20after%20a%20while.%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EI've%20found%20a%20previous%20post%20which%20has%20not%20been%20solved%20from%202017%20%3CA%20title%3D%22Old%20post%20Unknown%20users%20in%20Teams%22%20href%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2Fmicrosoft-teams%2Funknown-user-being-displayed%2Fm-p%2F37625%23M1757%22%20target%3D%22_self%22%3Ehere%3C%2FA%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EDoes%20anyone%20has%20any%20information%20about%20this%20bug%3F%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-LABS%20id%3D%22lingo-labs-1667791%22%20slang%3D%22en-US%22%3E%3CLINGO-LABEL%3EActivity%3C%2FLINGO-LABEL%3E%3CLINGO-LABEL%3EConversations%3C%2FLINGO-LABEL%3E%3CLINGO-LABEL%3EMessaging%3C%2FLINGO-LABEL%3E%3CLINGO-LABEL%3EMicrosoft%20Teams%3C%2FLINGO-LABEL%3E%3C%2FLINGO-LABS%3E%3CLINGO-SUB%20id%3D%22lingo-sub-1668299%22%20slang%3D%22en-US%22%3ERe%3A%20Unknown%20User%20displayed%20in%20chats%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-1668299%22%20slang%3D%22en-US%22%3EBest%20you%20can%20do%20here%20is%20to%20report%20the%20problem%20through%20a%20support%20ticket.%20It's%20quite%20probable%20you%20will%20be%20asked%20to%20provide%20Teams%20Client%20Logs%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-1672756%22%20slang%3D%22en-US%22%3ERe%3A%20Unknown%20User%20displayed%20in%20chats%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-1672756%22%20slang%3D%22en-US%22%3EJust%20closed%20a%20case%20%40%20Microsoft.%20It%20seems%20to%20be%20a%20local%20home%20network%20issue..%3CBR%20%2F%3E%3CBR%20%2F%3EEnd-user%20will%20contact%20ISP.%3C%2FLINGO-BODY%3E
Occasional Contributor

Hi All,

 

Some of our employees have a list of Unknown users displayed while the "Unknown User" is an active user in AD/AAD/O365.

 

I picked one affected employee and reinstalled Office 365 and Teams but the issue reoccured after a while.

 

I've found a previous post which has not been solved from 2017 here

 

Does anyone has any information about this bug?

2 Replies
Best Response confirmed by R0chdle (Occasional Contributor)
Solution
Best you can do here is to report the problem through a support ticket. It's quite probable you will be asked to provide Teams Client Logs
Just closed a case @ Microsoft. It seems to be a local home network issue..

End-user will contact ISP.